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Oval|Natural|IGI

1.51ct K SI1 Oval Natural Diamond

VG • K/SI1 • IGI 720526840

Shape and cutting style on the report: Oval brilliant

Certificate IGI 720526840

Diamond specifications and retailer prices

From £1,866 GBP
As of November 5, 2026
Save £2,489 GBP (57%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,355 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 720526840. Listed at 14 retailers as of November 5, 2026, with prices from £1,866 to £4,355, a £2,489 spread on the same certified stone. NZ Jewellers lists it at £4,355. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.4°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 720526840
Dimensions9.16 × 6.48 × 4.01 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizePointed
Top View
9.16 mm6.48 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 720526840
Side View
Table 58.0%Crown 33.4°Girdle: MED-THKPavilion 41.4°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £2,542 GBP|Low: £1,866 GBP|High: £3,692 GBP|Avg: £2,351 GBP|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 8£1,866 GBP
Retailer 4£2,028 GBP
Retailer 6£2,043 GBP
Retailer 7£2,083 GBP
Retailer 9£2,163 GBP
Retailer 2£2,244 GBP
Retailer 5£2,437 GBP
Retailer 1£2,542 GBP
Retailer 3£3,639 GBP

39 data points across 9 retailers

14 retailers£1,866 GBP to £4,355 GBP

A
Cheapest Retailer
-
£1,866 GBP
B+
Retailer 2
-
£1,986 GBP
View
A
Retailer 3
-
£2,028 GBP
View
B+
Retailer 4
-
£2,043 GBP
View
Retailer 5
-
£2,083 GBP
View
Price last confirmed 8 days ago
B+
Retailer 6
-
£2,083 GBP
View
B+
Retailer 7
-
£2,163 GBP
View
B+
Retailer 8
-
£2,188 GBP
View
B+
Retailer 9
-
£2,244 GBP
View
B+
Retailer 10
-
£2,403 GBP
View
B+
Retailer 11
-
£2,437 GBP
View
B+
Retailer 12
-
£2,542 GBP
View
B
Retailer 13
-
£3,639 GBP
View
Most Expensive
B
NZ Jewellers
2dc671e7-14e7-4444-ab2c-7216e85e81f4 · Nov 5
£4,355 GBP
$5,829 USD
View
13 more retailers have this diamond
Prices start from £1,866 GBPSave up to £2,489 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Oval
£1,866 GBP